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* Machine ID Manager
*
* Generates and persists a unique machine identifier for agent registration.
* Uses hardware-based ID generation with file-based persistence for consistency.
*
* Requirements: MVP.4.1.2
*/
import machineIdPkg from 'node-machine-id';
const { machineIdSync } = machineIdPkg;
import { promises as fs } from 'fs';
import { join } from 'path';
import os from 'os';
import { createLogger } from '../utils/logger.js';
const logger = createLogger('machineId');
export class MachineIdManager {
private configDir: string;
private idFile: string;
constructor(configDir: string = join(os.homedir(), '.buildhive')) {
this.configDir = configDir;
this.idFile = join(configDir, 'machine-id');
}
/**
* Get machine ID - loads from file or generates new one
*/
async getMachineId(): Promise<string> {
// Try to load from file first
try {
const storedId = await fs.readFile(this.idFile, 'utf8');
if (storedId && storedId.trim()) {
logger.info('Loaded machine ID from file');
return storedId.trim();
}
} catch (error) {
// File doesn't exist, will generate new
logger.debug('No stored machine ID found, generating new one');
}
// Generate new machine ID based on hardware
const machineId = machineIdSync(true);
logger.info('Generated new machine ID');
// Store for future use
await this.storeMachineId(machineId);
return machineId;
}
/**
* Store machine ID to file for persistence
*/
private async storeMachineId(machineId: string): Promise<void> {
try {
await fs.mkdir(this.configDir, { recursive: true });
await fs.writeFile(this.idFile, machineId, 'utf8');
await fs.chmod(this.idFile, 0o600); // Read/write for owner only
logger.info(`Stored machine ID to ${this.idFile}`);
} catch (error) {
logger.error('Failed to store machine ID:', error);
throw new Error(
`Failed to store machine ID: ${error instanceof Error ? error.message : 'Unknown error'}`
);
}
}
/**
* Check if machine ID exists
*/
async exists(): Promise<boolean> {
try {
await fs.access(this.idFile);
return true;
} catch {
return false;
}
}
/**
* Clear stored machine ID (for testing or reset)
*/
async clear(): Promise<void> {
try {
await fs.unlink(this.idFile);
logger.info('Cleared stored machine ID');
} catch (error) {
// Ignore if file doesn't exist
if ((error as NodeJS.ErrnoException).code !== 'ENOENT') {
logger.error('Failed to clear machine ID:', error);
}
}
}
}
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